“No matter what that timeline was, the response was as quick as possible,” Lombardo said. “I don’t think the response could have been any faster,”

Nevertheless, Lombardo’s shifting timeline has raised more questions about the worst mass shooting in history.

MGM Resorts, which owns the Mandalay Bay, released a statement Tuesday that said it “cannot be certain about the most recent timeline” released publicly “and we believe what is currently being expressed may not be accurate.”

The company did not specify what part of the timeline they took issue with.